Re: [Xen-devel] [PATCH] evtchn: make support for different ABIs tunable

[Julien Grall <julien.grall@xxxxxxx>]

Hi,

On 07/08/2019 15:35, Jan Beulich wrote:
> On 07.08.2019 13:20, Eslam Elnikety wrote:
 >> --- a/xen/include/xen/sched.h
> > +++ b/xen/include/xen/sched.h
> > @@ -338,6 +338,7 @@ struct domain
> >      struct evtchn  **evtchn_group[NR_EVTCHN_GROUPS]; /* all other buckets */
> >      unsigned int     max_evtchns;     /* number supported by ABI */
> >      unsigned int     max_evtchn_port; /* max permitted port number */
> > +    bool             disable_evtchn_fifo;            /* force 2l ABI */
> >      unsigned int     valid_evtchns;   /* number of allocated event channels */
> >      spinlock_t       event_lock;
> >      const struct evtchn_port_ops *evtchn_port_ops;
> I suppose you can find a better place to put this 1-byte field
> than between two 32-bit ones, leaving a 3-byte hole.
Or just remove the field because the same value is already stored in 
d->options...

Cheers,

--
Julien Grall

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